NVIDIA GT 740 is not detected but fan is working

Nov 4, 2017
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I have just installed a graphic card NVIDIA GT740 on my motherboard ASUS P8H61-M. I'm connecting the monitor in the VGA port and it shows "No signal", although graphic card's fan is working, so I guess it is well plugged on the PCI. If I connect the monitor in the integrated card, it works fine.

I'm on an Ubuntu 16.04 machine and if I run "lspci", graphic card is not shown; it's not detected. I'm stuck and I don't know what to do more. Ask anything you need to know to help me.

This is my BIOS info:
Vendor: American Megatrends Inc.
Version: 0702
Release Date: 10/09/2012
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 8192 kB
Characteristics:
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported

BIOS Revision: 4.6

I see that BIOS can be updated, can it be the cause?

Thanks